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| If your operating system didn't detect your printer, first make sure the printer is plugged in and turned on. Some printers are "always on", but others have a switch that needs to be flipped. |
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| Make sure the parallel cable is plugged into the proper sockets and that the connections are snug. |
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| Examine all of your connectors with an eye for excessive dust and bent or missing pins. You can clean dust with a compressed-air canister, but a bent or missing pin usually means you'll need to replace the cable to prevent a short circuit. |
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| Examine the cable's connection to the scanner to make sure it's snug and that the cable is inserted into the port marked "Printer". |
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| If your computer still doesn't recognize the printer, try powering the system down and resetting all connections. |
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| After you ensure all connections are secure, plug your computer back in and turn it on. Your operating system should detect the scanner. |
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| If your operating system still doesn't recognize the printer, disconnect the scanner and see if the system will recognize the printer without the scanner in the middle. If not, there may be an incompatability between the scanner and printer software – check your scanner and printer documentation to see if that is the case. |
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